Flemish buttermilk mashed potatoes with grey shrimp, creamy poached egg and butter sauce!
Peel and chop the potatoes. Transfer them to a medium saucepan with salted water and boil them until cooked through. Then drain the potato and add them back to the pan with half of the butter and the sour cream (optional).
Mash the potatoes. Add the freshly chopped parsley or chives, pour in the buttermilk and season with a little pepper and salt.